Heather Eve Castel

Black Opal Ventures thesis

We Support Founders Building a Brilliant Tomorrow Investing in companies using technology to solve the world's biggest problems How We Got Started Tara Bishop and Eileen Tanghal met 30 years ago while studying at MIT. There, they became roommates, classmates, and close friends. Since graduating, they have spent their careers innovating and building resilient infrastructure in their respective fields. ​ They kept in close contact in the proceeding years as they embarked on various personal and professional journeys. Prior to starting Black Opal, Eileen had an over 20-year career in venture capi

Sector and stage focus

• Seed: Medical Devices, Pharmaceuticals, BioTech, Logistics, Health IT, Digital Health, FinTech, Health & Hospital Services
• Series B: BioTech, Medical Devices, Logistics, Pharmaceuticals, FinTech, Health & Hospital Services, Digital Health, Health IT
• Series A: Medical Devices, Logistics, Pharmaceuticals, Health IT, BioTech, Health & Hospital Services, FinTech, Digital Health
• general: New York City, Angel, Scout, and Solo-Capitalists

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